areadiff {spatstat} | R Documentation |
Computes the area of that part of a disc that is not covered by other discs.
areadiff(u, X, r, ngrid=256)
u |
Coordinates of the centre of the disc. A vector of length 2. |
X |
Locations of the centres of other discs.
A point pattern (object of class "ppp" ).
|
r |
Disc radius. |
ngrid |
Dimensions of the ngrid * ngrid array of test points
that will be used to estimate the uncovered area.
|
This function computes the area of that part of
the disc of radius r
centred at the location u
that is not covered by any of the discs of radius r
centred at the points of the pattern X
.
A single number (the uncovered area)
Adrian Baddeley adrian@maths.uwa.edu.au http://www.maths.uwa.edu.au/~adrian/ and Rolf Turner r.turner@auckland.ac.nz
data(cells) u <- c(0.5,0.5) areadiff(u, cells, 0.1)